Help! Power question

The start of the condenser is causing a whole house voltage drop. I’ve seen this and I’m wondering if the wires leading to the condenser are undersized. You only need a 200 amp service panel if you have a larger home( over 3500sq/ft). 
A/c units normally draw about 25amps during start up that’s why you have a 30 amp breaker connected to it. I would have an electrician check out the work that was done. He/she will find out what’s going on very quickly. 
Giid luck!

Surge protectors do not guard against voltage sags, they absorb the punch of a voltage spike.

Do the lights dim? Not just a tiny bit, but a lot. If that is the case, then have the electrician to check -- in addition to the HVAC contractor's work -- the wiring to your dedicated outlet and the rest of the house. If you have aluminum wires from the meter to the main panel lugs, have him check those. It's not uncommon for the lugs to loosen over time causing oxidation at the contacts and making voltage sags more serious than they have to be.

AC units draw a lot of current on startup and it's not uncommon (or abnormal) for the lights to dim a tiny bit. The power supply of your pc and dac easily compensate under this condition. But if the voltage drops too low, it confuses the voltage regulators in your electronics and things can stop working.

You may need to balance the load. On the panel should be 2 legs. Put ac on one side and outlet on the opposite leg.

pcc67

On the panel should be 2 legs. Put ac on one side and outlet on the opposite leg.

His problem is with a central A/C. That means it's almost certainly 240VAC (if in the US), which means it's attached to both legs of his electric service.

Let me be clearer on the subject of balancing. On the main breaker 200amp  you have 2 legs off that, that go down the center of the panel. The breakers on the left are one one leg. The breakers on the right are on the other leg. If both the ac breaker and the breaker feeding the outlet you are having issues with are on the same leg, this may be the issue with the drop in power. You are drawing current off the same leg. Balancing would put both circuits on opposite legs. Also you may need a starter kit. I also have central ac. But my HT room is on separate leg. No issues.